The Seattle PI offers a useful guide to pitch types.
It includes photographs of how different pitches are gripped and are released.
Eri Yoshida, the 18-year-old female knuckleballer, recorded her first strikeout.
Pitching for the independent Chico Outlaws, she went four innings and gave up two runs. She taught herself the knuckleball by studying Tim Wakefield tapes.
Why does the quality of middle infielder hitting vary so drastically from era to era?
David Leonhardt canvasses some theories and comes to some tentative results. I think it has more to do with random variation than any grand theory, because just a few great players can affect the numbers a great deal.
Are morning people better pitchers than night owls?
One study says yes, although a relatively small sample and reliance on ERA limit its value. Another finding was that teams traveling west to east have a marked advantage over teams traveling in the opposite direction.